Accelometer and gyroscope filters explanation

ArduPlane Plane 4.5
1

In: ‘Complete Parameter List
Full Parameter List of Plane latest V4.6.0 dev’ page, the explanations for the parameters:

INS_ACCEL_FILTER
INS_GYRO_FILTER

Are a very short and uninformative explanations.

Can anyone refer me to a laymen but extended explanation as to what these filters do?

2

They are both low pass filters applied before the control loop.